Hierarchy Level item of ODO unexpected create after confirmed first HU WT

Dear All,

I would like to fix this issue any idea it would be appreciated.

I'm working on EWM 9.4, I created Outbound Delivery in ERP with only 1 item and distributed to EWM. In EWM came with 1 item like usual then i created 2 HU WTs (1WT/1WO) to fulfill this picking. It's just a normal picking processes. (VAS, Kitting, etc.. are not relevant)

But after I confirmed first HU WT, another ODO item is created with Hierarchy Level 1 and Picking Status of Header is completed even I haven't confirmed all HU WTs yet. I'm curious to find out. Please give me some advice,

Thanks and Best regards

Sarinya